| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 31 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Electrical machinery and energy | |
| #3 | Machines | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Soldering, welding and flame cutting | |
| #2 | Unspecified technologies | |
| #3 | Magnets and transformers | |
| #4 | Electric switches | |
| #5 | Sawing | |
| #6 | Gearing | |
| #7 | Pipes | |
| #8 | Electric discharge tubes | |
| #9 | Spark gaps and corona devices | |
| #10 | Turning |
| # | Name | Total Patents |
|---|---|---|
| #1 | Von Henke Edmund J | 27 |
| #2 | Watson Harry C | 2 |
| #3 | Grothe Arthur A | 2 |
| #4 | Corwin Howard D | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2267543A | Tubing cutter | |
| US2352992A | Electric switch | |
| US2279932A | Method of installing cooling devices in welding electrodes | |
| US2244508A | Electric welding apparatus | |
| US2289836A | Controlling circuit for alternating currents | |
| US2289813A | Electric switch | |
| US2236162A | Hand-welding tool | |
| US2185716A | Welding machine | |
| US2170700A | Welding machine transformer | |
| US2120383A | Pulley | |
| US2132196A | Transformer | |
| US2151342A | Welding apparatus | |
| US2147868A | Method of welding | |
| US2088936A | Electrode | |
| US2031082A | Welding machine | |
| US2029846A | Coupling | |
| US2057011A | Rapid cut-off machine | |
| US2022699A | Apparatus for manufacturing welded tubing | |
| US1880535A | Welding machine | |
| US1930295A | Tubing cutter |